Calling all Merc Mechanics

[randlemanboater]

My "new" 1999 Merc 150 is overheating. I was hoping that it was giving false whistles because of dead battery but with a good battery it still alarms.

I started the motor and within 4 minutes the alarm went off. There was a good stream of water spraying out but the water was very hot.


I am going to take Kajun's advise and check the thermostats. Are these the thermostat housings?

http://i145.photobucket.com/albums/r222/randlemanboater/101_0075.jpg

http://i145.photobucket.com/albums/r222/randlemanboater/101_0074.jpg



Also, shouldn't there be something attached to this?

http://i145.photobucket.com/albums/r222/randlemanboater/101_0073-1.jpg

[randlemanboater]

My "new" 1999 Merc 150 is overheating. I was hoping that it was giving false whistles because of dead battery but with a good battery it still alarms.

I started the motor and within 4 minutes the alarm went off. There was a good stream of water spraying out but the water was very hot.


I am going to take Kajun's advise and check the thermostats. Are these the thermostat housings?

http://i145.photobucket.com/albums/r222/randlemanboater/101_0075.jpg

http://i145.photobucket.com/albums/r222/randlemanboater/101_0074.jpg



Also, shouldn't there be something attached to this?

http://i145.photobucket.com/albums/r222/randlemanboater/101_0073-1.jpg

[THEFERMANATOR]

Those hoses look like bleeds, not the t-stats. and the last pic looks like some sort of valve.


I went and looked at my old merc and that is where the T-stats are on it. they just don't look big enough in your pics. If there the old style t-stats you can get them from WEST MARINE or even a evinrude dealer.

[THEFERMANATOR]

Those hoses look like bleeds, not the t-stats. and the last pic looks like some sort of valve.


I went and looked at my old merc and that is where the T-stats are on it. they just don't look big enough in your pics. If there the old style t-stats you can get them from WEST MARINE or even a evinrude dealer.

[randlemanboater]

All I can read on the plate is 166856. I cant tell if there are any letters or numbers in front of this number.

[randlemanboater]

All I can read on the plate is 166856. I cant tell if there are any letters or numbers in front of this number.

[macojoe]

I am not a Merc guy but that is were the stats are. Just take them out for now and run with out to see if that solves the problem, if so get new ones and you good to go!!

As far as the 2nd thing I have no idea?

[macojoe]

I am not a Merc guy but that is were the stats are. Just take them out for now and run with out to see if that solves the problem, if so get new ones and you good to go!!

As far as the 2nd thing I have no idea?

[reelapeelin]

Wish Bigshrimpin' would stop by...he's a good Merc man...Hey BIG!!...little help over here ;D ...


Recently someone pulled the heads to find SAND filled the water passages...anybody remember who?...the pictures told a sad, but very fixable story...




overheat problems:

bad t'stat(s)
bad water-pump (impeller)
water flow (blockage)

Let's see...what else?...

[reelapeelin]

Wish Bigshrimpin' would stop by...he's a good Merc man...Hey BIG!!...little help over here ;D ...


Recently someone pulled the heads to find SAND filled the water passages...anybody remember who?...the pictures told a sad, but very fixable story...




overheat problems:

bad t'stat(s)
bad water-pump (impeller)
water flow (blockage)

Let's see...what else?...

[parishht]

Here is the link to the sand post:

http://www.wellcraftv20.com/cgi-bin/yabb/YaBB.cgi?board=Repairs;action=display;num=11664101 03;start=11#11

[parishht]

Here is the link to the sand post:

http://www.wellcraftv20.com/cgi-bin/yabb/YaBB.cgi?board=Repairs;action=display;num=11664101 03;start=11#11

[Airslot]

You have a positive on the t-stat housings. I don't know what the last pic is ???

Airslot

[Airslot]

You have a positive on the t-stat housings. I don't know what the last pic is ???

Airslot

[macojoe]

Well its pumping, so pump good.

Stats next, cheapest thing!

then remove heads when all else fails.

Kajun with the sand:

http://www.wellcraftv20.com/cgi-bin/yabb/YaBB.cgi?board=Repairs;action=display;num=11664101 03

[macojoe]

Well its pumping, so pump good.

Stats next, cheapest thing!

then remove heads when all else fails.

Kajun with the sand:

http://www.wellcraftv20.com/cgi-bin/yabb/YaBB.cgi?board=Repairs;action=display;num=11664101 03

[msbhammer]

I was thinking sand as well. I know looks can be decieving, but that motor with such low hours and the condition its in, should be only a quick fix.
Where is Master, Lord SKOOL at. ???

[msbhammer]

I was thinking sand as well. I know looks can be decieving, but that motor with such low hours and the condition its in, should be only a quick fix.
Where is Master, Lord SKOOL at. ???

[msbhammer]

Randleman, so what did te wife say. She like or are you sleeping in the V tonight ?? ;D

[msbhammer]

Randleman, so what did te wife say. She like or are you sleeping in the V tonight ?? ;D

[phatdaddy]

R-man, i just went out to look at my 94 150 mariner. there should be a hose that goes from one of the ports on that valve to your carbs. I'll snapa few pics and get back to ya.

[phatdaddy]

R-man, i just went out to look at my 94 150 mariner. there should be a hose that goes from one of the ports on that valve to your carbs. I'll snapa few pics and get back to ya.

[msbhammer]

Good job Phats. ;)
I want the motor running good when Randleman donates it to me. ::)

[msbhammer]

Good job Phats. ;)
I want the motor running good when Randleman donates it to me. ::)

[C YENSEN]

I/O guy here......sorry i am of no help on this one :'( ;D

[C YENSEN]

I/O guy here......sorry i am of no help on this one :'( ;D

[randlemanboater]

I will pull the thermostats tomorrow and cross my fingers.

When I was looking for the serial number earlier, I found something else not connected, I'll get pics of it tomorrow. It looked like it may have been related to the oiling system, assuming it had that. It runs on premix now.

[randlemanboater]

I will pull the thermostats tomorrow and cross my fingers.

When I was looking for the serial number earlier, I found something else not connected, I'll get pics of it tomorrow. It looked like it may have been related to the oiling system, assuming it had that. It runs on premix now.

[reelapeelin]

Yep, '99 woulda been an auto-oiler...glad to hear she's a mixer now...did you talk to David about it?



R-Man...are you familiar w/ Accu-Mix bottle...easiest way to mix gas/oil 8)...$3.99 at most dealers (Merc or others) and I think I saw 'em in Wallyworld...

[reelapeelin]

Yep, '99 woulda been an auto-oiler...glad to hear she's a mixer now...did you talk to David about it?



R-Man...are you familiar w/ Accu-Mix bottle...easiest way to mix gas/oil 8)...$3.99 at most dealers (Merc or others) and I think I saw 'em in Wallyworld...

[randlemanboater]

Yep, '99 woulda been an auto-oiler...glad to hear she's a mixer now...did you talk to David about it?



R-Man...are you familiar w/ Accu-Mix bottle...easiest way to mix gas/oil 8)...$3.99 at most dealers (Merc or others) and I think I saw 'em in Wallyworld...

David did not know much about boats, especially this one. I think he only took it out 2 or 3 times all the years he had it.

Accu-mix bottle came with the boat filled with oil. ;D

[randlemanboater]

Yep, '99 woulda been an auto-oiler...glad to hear she's a mixer now...did you talk to David about it?



R-Man...are you familiar w/ Accu-Mix bottle...easiest way to mix gas/oil 8)...$3.99 at most dealers (Merc or others) and I think I saw 'em in Wallyworld...

David did not know much about boats, especially this one. I think he only took it out 2 or 3 times all the years he had it.

Accu-mix bottle came with the boat filled with oil. ;D

[phester]

TinMan was having overheat issues as well w/ his 98 200 Merc. He hasn't been around much lately......he did alot of diagnostic/trail and error......didn't get it sorted out yet but there was alot of speculation leaning toward the "poppet" valve. Mercs seem to have their share of cooling issues. A bevy of information to be had on THT about Mercurys. Hope you get it worked out, nice boat too , good luck :D

[phester]

TinMan was having overheat issues as well w/ his 98 200 Merc. He hasn't been around much lately......he did alot of diagnostic/trail and error......didn't get it sorted out yet but there was alot of speculation leaning toward the "poppet" valve. Mercs seem to have their share of cooling issues. A bevy of information to be had on THT about Mercurys. Hope you get it worked out, nice boat too , good luck :D

[randlemanboater]

Randleman, so what did te wife say. She like or are you sleeping in the V tonight ?? *;D


She liked it, glad too cause there are no cushions in the cabin. She is a good woman who puts up with my boat addiction.

[randlemanboater]

Randleman, so what did te wife say. She like or are you sleeping in the V tonight ?? *;D


She liked it, glad too cause there are no cushions in the cabin. She is a good woman who puts up with my boat addiction.

[randlemanboater]

TinMan was having overheat issues as well w/ his 98 200 Merc. He hasn't been around much lately......he did alot of diagnostic/trail and error......didn't get it sorted out yet but there was *alot of speculation leaning toward the "poppet" valve. Mercs seem to have their share of cooling issues. A bevy of information to be had on THT about Mercurys. Hope you get it worked out, nice boat too , good luck :D *


I wonder if this is the poppet valve.

http://i145.photobucket.com/albums/r222/randlemanboater/101_0073-1.jpg

[randlemanboater]

TinMan was having overheat issues as well w/ his 98 200 Merc. He hasn't been around much lately......he did alot of diagnostic/trail and error......didn't get it sorted out yet but there was *alot of speculation leaning toward the "poppet" valve. Mercs seem to have their share of cooling issues. A bevy of information to be had on THT about Mercurys. Hope you get it worked out, nice boat too , good luck :D *


I wonder if this is the poppet valve.

http://i145.photobucket.com/albums/r222/randlemanboater/101_0073-1.jpg

[reelapeelin]

With the barbs on those two nipples, there's GOTTA have been hoses on those at some time...I'm thinkin' oiler related...particularly since oiler discoed ;) ...wonder if those holes should be plugged?... ??? ...




Good deal on the Accu-Mix bottle ;) ...

[reelapeelin]

With the barbs on those two nipples, there's GOTTA have been hoses on those at some time...I'm thinkin' oiler related...particularly since oiler discoed ;) ...wonder if those holes should be plugged?... ??? ...




Good deal on the Accu-Mix bottle ;) ...

[phatdaddy]

rmb, there is hose that goes on the top barb to your carbs. i think it might be vacuum related. hope the following pics help.

t stat, like you thought
http://i40.photobucket.com/albums/e203/ffatdaddy/starboardtstat.jpg

other side
http://i40.photobucket.com/albums/e203/ffatdaddy/porttstat.jpg

barb fitting

http://i40.photobucket.com/albums/e203/ffatdaddy/motor2.jpg

hose linking carbs

http://i40.photobucket.com/albums/e203/ffatdaddy/motor3.jpg

[phatdaddy]

rmb, there is hose that goes on the top barb to your carbs. i think it might be vacuum related. hope the following pics help.

t stat, like you thought
http://i40.photobucket.com/albums/e203/ffatdaddy/starboardtstat.jpg

other side
http://i40.photobucket.com/albums/e203/ffatdaddy/porttstat.jpg

barb fitting

http://i40.photobucket.com/albums/e203/ffatdaddy/motor2.jpg

hose linking carbs

http://i40.photobucket.com/albums/e203/ffatdaddy/motor3.jpg

[phatdaddy]

This is shot showing the linked carbs a little better


http://i40.photobucket.com/albums/e203/ffatdaddy/motor4.jpg

[phatdaddy]

This is shot showing the linked carbs a little better


http://i40.photobucket.com/albums/e203/ffatdaddy/motor4.jpg

[BuilderFL]

The first picture of your last post, were you say " there is hose that goes on the top barb to your carbs" your thermostats is were your thumb is pointing. See the sensor wire to the alarm.

[BuilderFL]

The first picture of your last post, were you say " there is hose that goes on the top barb to your carbs" your thermostats is were your thumb is pointing. See the sensor wire to the alarm.

[Skools Out]

run it first without any see if it fix's the problem like MJ said. then replace if it runs good with none. that was the location you posted in those pics i had an old V4 140 that ran hot all the time with t-stats but ran fine without so you can guess it i took them out never had the first problem.

[Skools Out]

run it first without any see if it fix's the problem like MJ said. then replace if it runs good with none. that was the location you posted in those pics i had an old V4 140 that ran hot all the time with t-stats but ran fine without so you can guess it i took them out never had the first problem.

[phatdaddy]

it might be some sort of a pcv valve ???


The poppet valve is located underneath the bottom of the powerhead on the intermediate housing. you have to remove the lower cowling pan to access it.

[phatdaddy]

it might be some sort of a pcv valve ???


The poppet valve is located underneath the bottom of the powerhead on the intermediate housing. you have to remove the lower cowling pan to access it.

[THEFERMANATOR]

I do know that MERCURY set there overheat alarm at a very low temp. A friend had a 90 HP and 2 little pieces of grass on the pickup would set the hot horn off.

[THEFERMANATOR]

I do know that MERCURY set there overheat alarm at a very low temp. A friend had a 90 HP and 2 little pieces of grass on the pickup would set the hot horn off.

[Kajun]

yea that was me with the sand issue...still havent figured it out...i have changed thermostats,heat sensor switches...pulled and flushed heads/powerhead, new waterpump and impeller...still overheats.....i bought a laser thermometer and was able to figure out which cylinder was over heating.....i then pulled the thermostats out and it runs 30 degrees cooler on that cyl on the hose, i havent been able to run it in the water yet.

sure hope yours is easier to find than mine has been.

[Kajun]

yea that was me with the sand issue...still havent figured it out...i have changed thermostats,heat sensor switches...pulled and flushed heads/powerhead, new waterpump and impeller...still overheats.....i bought a laser thermometer and was able to figure out which cylinder was over heating.....i then pulled the thermostats out and it runs 30 degrees cooler on that cyl on the hose, i havent been able to run it in the water yet.

sure hope yours is easier to find than mine has been.

[randlemanboater]

Well, I when to church this morning and prayed for patience, then I stuffed myself at Golden Coral.

Then I removed the thermostats. I doubt that they were slowing down much water.

http://i145.photobucket.com/albums/r222/randlemanboater/101_0080.jpg

Buttoned her back up, started and ran for about 3.5 minutes before the alarm came on.

AAAAAHHHHHHHHHHH!!!!!!!

Kajun has turned me onto a Merc. Mechanic who helps people online (thanks dude), guess I'll see what he suggests next.

You can see that it pees good at idle.

http://i145.photobucket.com/albums/r222/randlemanboater/101_0082.jpg

I did stop in Walmart after lunch and pick up a couple items. Some 5200, some silicone sealant, and a new winch strap (the hook is tied on to the old one).

But instead of doing anything else to the boat today I did what any good southern dad does on Sunday afternoon, I gathered up the kids for some shootin practice.

http://i145.photobucket.com/albums/r222/randlemanboater/101_0084.jpg

http://i145.photobucket.com/albums/r222/randlemanboater/101_0085.jpg

[randlemanboater]

Well, I when to church this morning and prayed for patience, then I stuffed myself at Golden Coral.

Then I removed the thermostats. I doubt that they were slowing down much water.

http://i145.photobucket.com/albums/r222/randlemanboater/101_0080.jpg

Buttoned her back up, started and ran for about 3.5 minutes before the alarm came on.

AAAAAHHHHHHHHHHH!!!!!!!

Kajun has turned me onto a Merc. Mechanic who helps people online (thanks dude), guess I'll see what he suggests next.

You can see that it pees good at idle.

http://i145.photobucket.com/albums/r222/randlemanboater/101_0082.jpg

I did stop in Walmart after lunch and pick up a couple items. Some 5200, some silicone sealant, and a new winch strap (the hook is tied on to the old one).

But instead of doing anything else to the boat today I did what any good southern dad does on Sunday afternoon, I gathered up the kids for some shootin practice.

http://i145.photobucket.com/albums/r222/randlemanboater/101_0084.jpg

http://i145.photobucket.com/albums/r222/randlemanboater/101_0085.jpg

[garagenc]

I could tell in hte 1st pic that was the fingers of a policeyman, they had donut sugar on them. 8) ::) ::)

[garagenc]

I could tell in hte 1st pic that was the fingers of a policeyman, they had donut sugar on them. 8) ::) ::)

[msbhammer]

Powder surgar and gelly on the fingers. LOL !!, that was good. ;D

[msbhammer]

Powder surgar and gelly on the fingers. LOL !!, that was good. ;D

[76GMC1500]

If it were a thermostat problem, the water would be coming out cold because none would be circulating through the engine block and picking up heat. If the water is coming out hot, it is a insufficient flow problem. Check your water pump(s).

[76GMC1500]

If it were a thermostat problem, the water would be coming out cold because none would be circulating through the engine block and picking up heat. If the water is coming out hot, it is a insufficient flow problem. Check your water pump(s).

[Skools Out]

If it were a thermostat problem, the water would be coming out cold because none would be circulating through the engine block and picking up heat. *If the water is coming out hot, it is a insufficient flow problem. *Check your water pump(s).


???
???
::)

Ok the water goes threw the motor first before it comes out the pisser lol

[Skools Out]

If it were a thermostat problem, the water would be coming out cold because none would be circulating through the engine block and picking up heat. *If the water is coming out hot, it is a insufficient flow problem. *Check your water pump(s).


???
???
::)

Ok the water goes threw the motor first before it comes out the pisser lol

[randlemanboater]

I did notice two things running the motor at around 2K rpm, one, its loud as H&LL!!!!! (glad the little old lady next door is deaf), the other was that the stream was not steady. *I bet it needs an impeller.

[randlemanboater]

I did notice two things running the motor at around 2K rpm, one, its loud as H&LL!!!!! (glad the little old lady next door is deaf), the other was that the stream was not steady. *I bet it needs an impeller.

[Skools Out]

how long has it sat? look for dirty doober nest may have a stopped hose somewhere.

[Skools Out]

how long has it sat? look for dirty doober nest may have a stopped hose somewhere.

[msbhammer]

My Merc. doesnt pee steady that I noticed. Was told thats normal for Mercs. When I bought mine. Found alot of newspaper in te motore where mice were living. :-/

[msbhammer]

My Merc. doesnt pee steady that I noticed. Was told thats normal for Mercs. When I bought mine. Found alot of newspaper in te motore where mice were living. :-/

[THEFERMANATOR]

My 150 MERC didn't spray a steady stream either.

This may be a stupid question, but are you sure it is the overheat turning the horn on? Try unhooking the overheat sensors one at a time to see if it is actually the overheat sensors doing it. There is also a chance that parts of your old t-stats are obstructing flow somewhere in there fropm the looks of what you removed. Try running it with the t-stat covers off fopr just a few seconds and make sure water is flowing up to that point with a good stream.

[THEFERMANATOR]

My 150 MERC didn't spray a steady stream either.

This may be a stupid question, but are you sure it is the overheat turning the horn on? Try unhooking the overheat sensors one at a time to see if it is actually the overheat sensors doing it. There is also a chance that parts of your old t-stats are obstructing flow somewhere in there fropm the looks of what you removed. Try running it with the t-stat covers off fopr just a few seconds and make sure water is flowing up to that point with a good stream.

[Airslot]

Hmmm, maybe a bad sender? Have you put your hand on the heads while she's running? Maybe she's not really hot afterall? I do know that Mercs don;t pee till the stats open, then they pee different as the stats open and close, hence the reason not consistent as noted above. Your stats have been hollowed out, so that shouldn't be the case.

Just trying to keep the flow of ideas going.

Airslot

[Airslot]

Hmmm, maybe a bad sender? Have you put your hand on the heads while she's running? Maybe she's not really hot afterall? I do know that Mercs don;t pee till the stats open, then they pee different as the stats open and close, hence the reason not consistent as noted above. Your stats have been hollowed out, so that shouldn't be the case.

Just trying to keep the flow of ideas going.

Airslot

[Skools Out]

most likely they were having heating issues so they took the t-stats out. ???

[Skools Out]

most likely they were having heating issues so they took the t-stats out. ???

[msbhammer]

Shoot on down there SKOOL and rebuild that puppy.
You can always rebuild that riding mower another day. :P

[msbhammer]

Shoot on down there SKOOL and rebuild that puppy.
You can always rebuild that riding mower another day. :P

[msbhammer]

Great Pics. of the kids Randleman. ;)
What year is the motor ?
Whats the asking price.

[msbhammer]

Great Pics. of the kids Randleman. ;)
What year is the motor ?
Whats the asking price.

[macojoe]

I have a 94 Yamaha sitting in the yard doing the same thing? I have no idea why?? But I said to hell with it and hung a 175 Evinrude on the boat and will be parting out the Yamaha soon.

[macojoe]

I have a 94 Yamaha sitting in the yard doing the same thing? I have no idea why?? But I said to hell with it and hung a 175 Evinrude on the boat and will be parting out the Yamaha soon.

[randlemanboater]

Great Pics. of the kids Randleman. *;)
What year is the motor ?
Whats the asking price.


Thanks Hammer, the two girls and the boy in orange are mine, other kid is a neighbor.

It is a 1999. Havent set a price yet.....

[randlemanboater]

Great Pics. of the kids Randleman. *;)
What year is the motor ?
Whats the asking price.


Thanks Hammer, the two girls and the boy in orange are mine, other kid is a neighbor.

It is a 1999. Havent set a price yet.....

[randlemanboater]

I appreciate all the ideas guys.....we will solve this thing.


Skook's, I havent seen any dirt dobber signs, but that is something I will look for.

Ferm and Air, I am not sure that it is actually overheating, I will try the bad sensor theory too.

[randlemanboater]

I appreciate all the ideas guys.....we will solve this thing.


Skook's, I havent seen any dirt dobber signs, but that is something I will look for.

Ferm and Air, I am not sure that it is actually overheating, I will try the bad sensor theory too.

[spareparts]

the barb fitting is part of the idle air system, as the engine warms up, it allows more air into the intake trac to lean out the mixture, it should have one of the barbs connected to a hose taht runs to the front half of the engine, the other barb is left open.

Checking the sensors is a good starting point, its the ones with the tan/blue wire.
Go ahead and put a water pump in it, its regular mantance on a Merc, its the best starting point for figuring out whats wrong.

[spareparts]

the barb fitting is part of the idle air system, as the engine warms up, it allows more air into the intake trac to lean out the mixture, it should have one of the barbs connected to a hose taht runs to the front half of the engine, the other barb is left open.

Checking the sensors is a good starting point, its the ones with the tan/blue wire.
Go ahead and put a water pump in it, its regular mantance on a Merc, its the best starting point for figuring out whats wrong.

[Blue_Runner]

This might be a dumb thought, but you said its an auto oiler that has been disconnected - I wonder if they disconnected everything including the low oil alarm? *

Usually there are different beeping patterns for overheat and low oil. *Find out which is which and go from there. *

Can you put you hand on the block without burning it after a few minutes?

I had a friend that burned up a 150 force. It had a good stream of water, but alarm started going off and he didn't know any better. The water coming from the pisser was hooooot and he kept gettin it till she died.

Good luck! *Nice pics - is that your service weapon *8) ;D

P.S. I know nothing about Mercs - never owned one so this is all hearsay, your honor.

[Blue_Runner]

This might be a dumb thought, but you said its an auto oiler that has been disconnected - I wonder if they disconnected everything including the low oil alarm? *

Usually there are different beeping patterns for overheat and low oil. *Find out which is which and go from there. *

Can you put you hand on the block without burning it after a few minutes?

I had a friend that burned up a 150 force. It had a good stream of water, but alarm started going off and he didn't know any better. The water coming from the pisser was hooooot and he kept gettin it till she died.

Good luck! *Nice pics - is that your service weapon *8) ;D

P.S. I know nothing about Mercs - never owned one so this is all hearsay, your honor.

[randlemanboater]

I am going to check all this stuff.

I bought a waterpump kit 2day, I've never done one but I know yous guys will guide me.

Also going to check the poppet valve.

Yep, we carry .177 cal here.

[randlemanboater]

I am going to check all this stuff.

I bought a waterpump kit 2day, I've never done one but I know yous guys will guide me.

Also going to check the poppet valve.

Yep, we carry .177 cal here.

[76GMC1500]

The water coming out of the pissers should be warm, this means it has picked up heat within the engine and carried it out. *If it's hot, that means the water is spending too much time in the engine/there isn't enough flow. *This is a sign of a bad water pump. *If the water is cool, but the engine is hot, this means the water is bypassing the engine and just going through the manifolds. *This indicates a stuck thermostat. *If the pee stream is cold and the engine is cold, this indicates a thermostat that has failed open. The fact that you said the engine is loder than normal also indicates a lack of water flow and now I can say with some confidence that your pump is bad.

[76GMC1500]

The water coming out of the pissers should be warm, this means it has picked up heat within the engine and carried it out. *If it's hot, that means the water is spending too much time in the engine/there isn't enough flow. *This is a sign of a bad water pump. *If the water is cool, but the engine is hot, this means the water is bypassing the engine and just going through the manifolds. *This indicates a stuck thermostat. *If the pee stream is cold and the engine is cold, this indicates a thermostat that has failed open. The fact that you said the engine is loder than normal also indicates a lack of water flow and now I can say with some confidence that your pump is bad.

[spareparts]

just remember to put the drive in fwd gear before you take it off, that way when you put it back on, you can keep the shift shaft in time.

[spareparts]

just remember to put the drive in fwd gear before you take it off, that way when you put it back on, you can keep the shift shaft in time.

[randlemanboater]

just remember to put the drive in fwd gear before you take it off, that way when you put it back on, you can keep the shift shaft in time.

Thanks for the tip, several people have told me that getting the shift shaft correct is the hardest part of a waterpump job, but no one offered any advise.

[randlemanboater]

just remember to put the drive in fwd gear before you take it off, that way when you put it back on, you can keep the shift shaft in time.

Thanks for the tip, several people have told me that getting the shift shaft correct is the hardest part of a waterpump job, but no one offered any advise.

[spareparts]

think about the shift shaft in clock positions( looking over head after you pull the lower unit). 12 is fwd, 10:30 is neutral, 9 is reverse. 1 thru 8 will appear as neutral, but its not. Keeping it in fwd( and the controll box) will allow you to rotate the propshaft to spin the driveshaft to help puttuing the housing on the impeller and to align the driveshaft splines when you put it back on. Put a little grease on the splines( driveshaft and shift shaft when reassembling) and get someone to help you hold it up while your getting everything aligned, it also helps to have the engine trimmmed down so everthing aligns correcetly. After you get a nut on it, pull it up a little( so the shfit shaft slines are ingaged) and get your helper to shift the mototr from fwd, neutral and back to reverse while you're spinning the prop by hand, it should lock in fwd one direction, freewheel in neutral, and lock in revers. Better to find out now if the shifting is off rather than wait for you to get all the nuts and bolts tight. If the shifting isn't correct, drop the lower unit and start over( remember to put the shifter back in fwd before your helper gets out of the boat)

[spareparts]

think about the shift shaft in clock positions( looking over head after you pull the lower unit). 12 is fwd, 10:30 is neutral, 9 is reverse. 1 thru 8 will appear as neutral, but its not. Keeping it in fwd( and the controll box) will allow you to rotate the propshaft to spin the driveshaft to help puttuing the housing on the impeller and to align the driveshaft splines when you put it back on. Put a little grease on the splines( driveshaft and shift shaft when reassembling) and get someone to help you hold it up while your getting everything aligned, it also helps to have the engine trimmmed down so everthing aligns correcetly. After you get a nut on it, pull it up a little( so the shfit shaft slines are ingaged) and get your helper to shift the mototr from fwd, neutral and back to reverse while you're spinning the prop by hand, it should lock in fwd one direction, freewheel in neutral, and lock in revers. Better to find out now if the shifting is off rather than wait for you to get all the nuts and bolts tight. If the shifting isn't correct, drop the lower unit and start over( remember to put the shifter back in fwd before your helper gets out of the boat)

[phatdaddy]

remember the "hidden" bolt that is under the trim tab on the cavitation plate.

[phatdaddy]

remember the "hidden" bolt that is under the trim tab on the cavitation plate.

[randlemanboater]

Thanks for the good info guys......I was going to start first thing this morning but it is raining and I am working outdoors. Maybe it will blow over quick.

[randlemanboater]

Thanks for the good info guys......I was going to start first thing this morning but it is raining and I am working outdoors. Maybe it will blow over quick.

[msbhammer]

Actually looks like a nice day up here Randleman. Warm and sunny, but I'm stuck on day work for a few days.
>:(

[msbhammer]

Actually looks like a nice day up here Randleman. Warm and sunny, but I'm stuck on day work for a few days.
>:(

[randlemanboater]

The sun is out here now as well. I am going to eat lunch with the kids at school then I will get on the boat work.......I know I know, pictures.

[randlemanboater]

The sun is out here now as well. I am going to eat lunch with the kids at school then I will get on the boat work.......I know I know, pictures.

[macojoe]

39.4* and 15 to 25 wind :'(

[macojoe]

39.4* and 15 to 25 wind :'(

[randlemanboater]

Well it got up close to 70 here today, and we had a small thunderstorm. I even killed a mosquito.

I did the waterpump today, I'm gonna start a new thread on it.

[randlemanboater]

Well it got up close to 70 here today, and we had a small thunderstorm. I even killed a mosquito.

I did the waterpump today, I'm gonna start a new thread on it.

[Skools Out]

how well did it go together this afternoon? do you have the extras ready for ebay now lol I assumed it went well no return call i was hoping to hear ya call and say it's fixed lol

[Skools Out]

how well did it go together this afternoon? do you have the extras ready for ebay now lol I assumed it went well no return call i was hoping to hear ya call and say it's fixed lol

[randlemanboater]

I was hoping as well, but church time came so I didn't get to test it yet. We will see tomorrow.

[randlemanboater]

I was hoping as well, but church time came so I didn't get to test it yet. We will see tomorrow.

[msbhammer]

Randleman, you dont need Church. We are are here Praying for ya. I think you fixed teh problem. ;)

[msbhammer]

Randleman, you dont need Church. We are are here Praying for ya. I think you fixed teh problem. ;)

[randlemanboater]

Randleman, you dont need Church. We are are here Praying for ya. I think you fixed teh problem. *;)

I appreciate that bro, but I love to worship the lord with my church family. Plus today is Ash Wednesday.

I don't have much confidence in getting the fix today.
I think I will end up pulling the heads and finding sand and seashells all through the block.

But that ok, I'm learning some good stuff as I go.

[randlemanboater]

Randleman, you dont need Church. We are are here Praying for ya. I think you fixed teh problem. *;)

I appreciate that bro, but I love to worship the lord with my church family. Plus today is Ash Wednesday.

I don't have much confidence in getting the fix today.
I think I will end up pulling the heads and finding sand and seashells all through the block.

But that ok, I'm learning some good stuff as I go.

[THEFERMANATOR]

If it was me, I would go down to the auto parts store and buy one of those cheap pocket thermometers that you can use for A/C work(but they read up to 220). Put that up next to the heads and see if they're actually running hot.

[THEFERMANATOR]

If it was me, I would go down to the auto parts store and buy one of those cheap pocket thermometers that you can use for A/C work(but they read up to 220). Put that up next to the heads and see if they're actually running hot.

[randlemanboater]

That is a good call. I will be checking everything I can before I take off the heads.

[randlemanboater]

That is a good call. I will be checking everything I can before I take off the heads.

[randlemanboater]

SUCCESS!!!!!!!!

I guess a new waterpump is what it needed. I just ran it for 30 minutes on the hose and no warning buzzer.

I don't know if its because of the new waterpump pumping stronger or because of all the beating I did with the rubber hammer before I found the last bolt holding the gearcase on, but a bunch of sand came out of the motor while running it. I would say it was a good handfull.

Man am I relieved.

[randlemanboater]

SUCCESS!!!!!!!!

I guess a new waterpump is what it needed. I just ran it for 30 minutes on the hose and no warning buzzer.

I don't know if its because of the new waterpump pumping stronger or because of all the beating I did with the rubber hammer before I found the last bolt holding the gearcase on, but a bunch of sand came out of the motor while running it. I would say it was a good handfull.

Man am I relieved.

[Skools Out]

now the best thing you can do it go to a fresh water lake and run her WOT and clean the motor out really good with that fresh water from the lake. Then you will be good to go. take it Sat when it's suppose to be around 70*. Call BR here is close to ya.

[Skools Out]

now the best thing you can do it go to a fresh water lake and run her WOT and clean the motor out really good with that fresh water from the lake. Then you will be good to go. take it Sat when it's suppose to be around 70*. Call BR here is close to ya.

[msbhammer]

Randleman is our ne w MERC repair guy. Boy do I have a list of repairs for ya. *;D

[msbhammer]

Randleman is our ne w MERC repair guy. Boy do I have a list of repairs for ya. *;D

[randlemanboater]

Yeah, I'm tempted to drag her to the lake right now. But I have other crap to do today. Saturday is my son's birthday so I wont have time then either, but I am off Monday & Tuesday next week. I'll get it done soon.

[randlemanboater]

Yeah, I'm tempted to drag her to the lake right now. But I have other crap to do today. Saturday is my son's birthday so I wont have time then either, but I am off Monday & Tuesday next week. I'll get it done soon.

[randlemanboater]

Randleman is our ne w MERC repair guy. Biy do I have a list of repairs for ya. *;D

I am no mechanic, but I can change parts like a mad man.

[randlemanboater]

Randleman is our ne w MERC repair guy. Biy do I have a list of repairs for ya. *;D

I am no mechanic, but I can change parts like a mad man.

[C YENSEN]

hey randleman,

i posted a good one for you under the thread concerning hair line cracks.....chick it out. ;D

[C YENSEN]

hey randleman,

i posted a good one for you under the thread concerning hair line cracks.....chick it out. ;D

[macojoe]

Congrats!!!

Water pumps are fast easy repairs!!
And should be done on any motor that is bought use just so you know when it was done last!

[macojoe]

Congrats!!!

Water pumps are fast easy repairs!!
And should be done on any motor that is bought use just so you know when it was done last!

[Blue_Runner]

now the best thing you can do it go to a fresh water lake and run her WOT and clean the motor out really good with that fresh water from the lake. Then you will be good to go. take it Sat when it's suppose to be around 70*. Call BR here is close to ya.
I'll be on High Rock for a spin on my V Saturday or Sunday. Don't know which yet. I'm game :D

Right now the main battery is dead as a doornail. :'(

[Blue_Runner]

now the best thing you can do it go to a fresh water lake and run her WOT and clean the motor out really good with that fresh water from the lake. Then you will be good to go. take it Sat when it's suppose to be around 70*. Call BR here is close to ya.
I'll be on High Rock for a spin on my V Saturday or Sunday. Don't know which yet. I'm game :D

Right now the main battery is dead as a doornail. :'(

[parishht]

Good job Randle.

[parishht]

Good job Randle.

[randlemanboater]

I'll be on High Rock for a spin on my V Saturday or Sunday. *Don't know which yet. *I'm game *:D

Right now the main battery is dead as a doornail. *:'(


I gotta work Sunday, and Sat is out, but I definately would like someone along in their boat just in case.

[randlemanboater]

I'll be on High Rock for a spin on my V Saturday or Sunday. *Don't know which yet. *I'm game *:D

Right now the main battery is dead as a doornail. *:'(


I gotta work Sunday, and Sat is out, but I definately would like someone along in their boat just in case.

[Blue_Runner]

Drag her on down to tha "Rock" (high rock).

We'll race em title for title ;D

[Blue_Runner]

Drag her on down to tha "Rock" (high rock).

We'll race em title for title ;D

[Skools Out]

Hell yeah a Boat Version of Pinks

[Skools Out]

Hell yeah a Boat Version of Pinks

[Kajun]

congrats! take her out and run her good!

[Kajun]

congrats! take her out and run her good!

[randlemanboater]

Drag her on down to tha "Rock" (high rock).

We'll race em title for title *;D

My Merc will smoke your Yami anyday, literally, it really smokes a lot.

[randlemanboater]

Drag her on down to tha "Rock" (high rock).

We'll race em title for title *;D

My Merc will smoke your Yami anyday, literally, it really smokes a lot.

[Airslot]

Yes, the down side of running pre-mix. Lots of smoke at idle 'cause your burnin twice the oil it needs at idle...

[Airslot]

Yes, the down side of running pre-mix. Lots of smoke at idle 'cause your burnin twice the oil it needs at idle...

[reelapeelin]

If Ya'll get those two "Vs" together, pics would be cool 8) ...

[reelapeelin]

If Ya'll get those two "Vs" together, pics would be cool 8) ...

[Blue_Runner]

Don't worry, RB will be posting pics of my stern! I'll get a few shots of his bow while I'm out there!

[Blue_Runner]

Don't worry, RB will be posting pics of my stern! I'll get a few shots of his bow while I'm out there!

[randlemanboater]

Hey BR, that old V will sell much better with a nice 1999 Merc on it.

[randlemanboater]

Hey BR, that old V will sell much better with a nice 1999 Merc on it.

[Kajun]

randleman have you brought it out to the lake and ran it yet?

[Kajun]

randleman have you brought it out to the lake and ran it yet?

[randlemanboater]

I am shooting for Friday.

[randlemanboater]

I am shooting for Friday.